Stomach and Intestines — MCQs
Sugars are primarily absorbed in?
Tumour of the uncinate process of the pancreas will compress which artery
Which of the following is a true statement about Meckel's diverticulum?
Short gastric arteries are branches of which vessel?
A patient presents with abdominal distension. Based on the X-ray, which of the following bowel loops are dilated?
What is the diagnosis based on the image shown?
A patient presents with abdominal pain, blood in stools and a palpable mass on examination. A Barium Study was performed, probable diagnosis is?
Identify the artery labeled as 'X' in the provided angiography anatomy image.
Ligation of the common hepatic artery will compromise blood flow in
Gastrosplenic ligament contains ?
Stomach and Intestines Indian Medical PG Practice Questions and MCQs
Question 1: Sugars are primarily absorbed in?
- A. Duodenum
- B. Jejunum (Correct Answer)
- C. Ascending colon
- D. Ileum
Explanation: ***Jejunum*** - The **jejunum** is the primary site for the absorption of most digested nutrients, including the vast majority of **monosaccharides** (simple sugars like glucose, fructose, and galactose). - Its structure, with numerous **plicae circulares**, villi, and microvilli, provides a large surface area optimized for efficient nutrient uptake. *Duodenum* - The **duodenum** is mainly involved in the **chemical digestion** of food, receiving chyme from the stomach and mixing it with digestive enzymes from the pancreas and bile from the liver. - While some minimal absorption can occur, it is not the primary site for extensive sugar absorption. *Ileum* - The **ileum** is mainly responsible for the absorption of **vitamin B12** and **bile salts**. - Although some residual nutrient absorption can happen here if the jejunum is compromised, it is not the primary physiological site for sugar absorption. *Ascending colon* - The **ascending colon** is primarily involved in the absorption of **water and electrolytes**, forming solid stool. - It does not significantly absorb sugars; undigested carbohydrates reaching the colon are typically fermented by gut bacteria.
Question 2: Tumour of the uncinate process of the pancreas will compress which artery
- A. Superior mesenteric artery (Correct Answer)
- B. Inferior mesenteric artery
- C. Common hepatic artery
- D. Splenic artery
Explanation: ***Superior mesenteric artery*** - The **uncinate process** forms the lower and medial part of the head of the pancreas, hooking around and behind the **superior mesenteric vessels**. - A tumor in this region would therefore almost immediately compress the **superior mesenteric artery** and vein due to its close anatomical relationship. *Splenic artery* - The **splenic artery** runs along the superior border of the pancreas, primarily associated with the body and tail. - A tumor in the **uncinate process** (part of the head) would be anatomically distant from the splenic artery, making compression unlikely. *Inferior mesenteric artery* - The **inferior mesenteric artery** arises from the aorta much lower than the pancreas, typically at the L3 vertebral level. - Its anatomical position makes it spatially separated from the uncinate process of the pancreas, so compression is not expected. *Common hepatic artery* - The **common hepatic artery** runs anterior to the portal vein and to the left of the bile duct, supplying the liver. - It is located superior to the head of the pancreas and away from the uncinate process, hence not typically affected by tumors in that specific pancreatic region.
Question 3: Which of the following is a true statement about Meckel's diverticulum?
- A. It is found on the mesenteric side of the ileum
- B. It is located on the antimesenteric side of the ileum. (Correct Answer)
- C. Meckel's diverticulum is always associated with Littre's hernia
- D. It is a false diverticulum formed by mucosal herniation
Explanation: ***It is located on the antimesenteric side of the ileum.*** - Meckel's diverticulum is a **true diverticulum** located on the **antimesenteric border** of the ileum, typically within 100 cm of the ileocecal valve. - This anatomical position is characteristic and helps differentiate it from other intestinal anomalies. - It contains all layers of the bowel wall, distinguishing it from false diverticula. *It is a false diverticulum formed by mucosal herniation* - This statement is **incorrect** because Meckel's diverticulum is a **true diverticulum**, not a false one. - A true diverticulum contains **all three layers** of the bowel wall (mucosa, submucosa, and muscularis propria), unlike false diverticula which only involve mucosa and submucosa herniating through the muscular layer. - Meckel's diverticulum is a remnant of the **omphalomesenteric duct** (vitellointestinal duct) and often contains heterotopic gastric or pancreatic tissue. *It is found on the mesenteric side of the ileum* - This statement is incorrect as Meckel's diverticulum is characteristically found on the **antimesenteric side** of the ileum. - Its antimesenteric location is a key distinguishing feature and helps in surgical identification. *Meckel's diverticulum is always associated with Littre's hernia* - While it is possible for a Meckel's diverticulum to be present within a **hernia sac** (Littre's hernia), this association is **not always** present. - Littre's hernia is a specific type of hernia where a Meckel's diverticulum is contained within the hernia sac, but most Meckel's diverticula do not present as part of a hernia.
Question 4: Short gastric arteries are branches of which vessel?
- A. Celiac artery
- B. Splenic artery (Correct Answer)
- C. Left gastroepiploic artery
- D. Right gastroepiploic artery
Explanation: Splenic artery - The **short gastric arteries** originate directly from the terminal portion of the **splenic artery** near the splenic hilum. - They supply the superior part of the **greater curvature** of the stomach. *Celiac artery* - The **celiac artery** is the main trunk from which the splenic artery, common hepatic artery, and left gastric artery branch. - It does not directly give rise to the short gastric arteries. *Left gastroepiploic artery* - The **left gastroepiploic artery** is a branch of the **splenic artery** but does not give rise to the short gastric arteries. - It supplies the greater curvature of the stomach, traveling inferiorly. *Right gastroepiploic artery* - The **right gastroepiploic artery** is a branch of the **gastroduodenal artery**, which in turn comes from the common hepatic artery. - It supplies the greater curvature of the stomach from the right side and is unrelated to the short gastric arteries.
Question 5: A patient presents with abdominal distension. Based on the X-ray, which of the following bowel loops are dilated?
- A. Jejunum (Correct Answer)
- B. Duodenum
- C. Transverse colon
- D. Ileum
Explanation: ***Jejunum*** - The image shows dilated small bowel loops with prominent **valvulae conniventes** (also known as plicae circulares), which are characteristic of the jejunum. - These folds are typically closely spaced and extend across the entire lumen, giving a "coiled spring" or "stack of coins" appearance on plain radiographs when dilated. *Duodenum* - While the duodenum is part of the small bowel, it is the most proximal segment and typically not as diffusely involved in generalized small bowel dilation as the jejunum and ileum unless the obstruction is very high. - The valvulae conniventes in the duodenum are less prominent and more sparsely distributed compared to the jejunum. *Transverse colon* - The transverse colon is part of the large intestine and would show **haustra**, which are sacculations that do not extend across the entire lumen and are typically more widely spaced than valvulae conniventes. - The dilated loops in the image clearly show mucosal folds that span the entire width of the bowel. *Ileum* - The ileum also has valvulae conniventes, but they are less prominent and more sparsely distributed than in the jejunum. - In cases of small bowel obstruction or dilation, the jejunum characteristically shows more distinct and closely packed valvulae conniventes, making it the most identifiable segment in this image.
Question 6: What is the diagnosis based on the image shown?
- A. Ileal diverticulum
- B. Urachal cyst
- C. Umbilical fistula (Correct Answer)
- D. Omphalocele
Explanation: ***Umbilical fistula*** - The image shows a **patent vitelline duct (omphalomesenteric duct)**, which creates a direct connection between the umbilicus and the ileum, visible as an umbilical fistula. - This condition presents with **fecal discharge from the umbilicus** or **umbilical prolapse of intestinal mucosa**. *Ileal diverticulum* - An ileal diverticulum, such as a **Meckel's diverticulum**, is a blind pouch protruding from the ileum, usually not communicating with the umbilicus. - It would typically be noted as an **outpouching of the ileal wall**, without an external opening at the umbilicus unless complicated by rupture. *Urachal cyst* - A urachal cyst is a remnant of the **urachus**, which connects the bladder to the umbilicus during fetal development. - It would be located **between the umbilicus and the bladder** and contain urine or serous fluid, not intestinal contents. *Omphalocele* - An omphalocele is a **congenital abdominal wall defect** where abdominal organs protrude into the base of the umbilical cord. - The defect is **covered by a membrane**, and it involves herniation of abdominal contents, not a fistula with the intestine.
Question 7: A patient presents with abdominal pain, blood in stools and a palpable mass on examination. A Barium Study was performed, probable diagnosis is?
- A. Volvulus
- B. Meckel's Diverticulum
- C. Diverticulitis
- D. Intussusception (Correct Answer)
Explanation: ***Intussusception*** - This condition is characterized by a "telescoping" of one segment of the intestine into another, which can lead to **abdominal pain**, **rectal bleeding** (often described as "currant jelly" stools), and a **palpable sausage-shaped mass** on examination. - A barium study (specifically a **barium enema**) is often diagnostic and can also be therapeutic for intussusception, revealing a **coiled spring appearance** or an obstruction. *Volvulus* - Volvulus involves the **twisting of a loop of bowel** around its mesentery, often presenting with sudden onset, severe **abdominal pain**, vomiting, and constipation. - While it can cause an obstruction and pain, a palpable mass and bloody stools are less common initial findings compared to intussusception. *Meckel's Diverticulum* - Meckel's diverticulum is a **congenital outpouching** of the small intestine that can be asymptomatic or cause complications like **gastrointestinal bleeding** (due to ectopic gastric mucosa), obstruction, or diverticulitis. - While it can cause painless rectal bleeding, a palpable mass and acute, intermittent abdominal pain are not typical primary presentations for an uncomplicated Meckel’s diverticulum. *Diverticulitis* - Diverticulitis is the **inflammation of diverticula** (small pouches in the colon), typically presenting with **left lower quadrant abdominal pain**, fever, and changes in bowel habits. - While it can cause bleeding, a palpable mass is less common unless there's an abscess, and the clinical picture does not align as strongly with the "currant jelly stool" and classic palpable mass of intussusception.
Question 8: Identify the artery labeled as 'X' in the provided angiography anatomy image.
- A. Superior mesenteric artery (Correct Answer)
- B. Subclavian artery
- C. Celiac trunk
- D. Brachiocephalic trunk
Explanation: ***Superior mesenteric artery*** - The image displays a selective angiogram highlighting an artery branching off the **aorta** in the abdominal region and supplying multiple loops of bowel, characteristic of the superior mesenteric artery. - The location and extensive branching pattern supplying various abdominal structures confirm its identity as the **superior mesenteric artery**, which typically arises below the celiac trunk. *Subclavian artery* - The **subclavian artery** is located in the chest and shoulder region, supplying the upper limbs and parts of the head and neck. - Its anatomical location and distribution are distinctly different from the abdominal artery shown in the image. *Celiac trunk* - The **celiac trunk** is an earlier branch off the aorta, typically arising just below the diaphragm, and it branches into the splenic, left gastric, and common hepatic arteries. - The artery labeled 'X' arises lower than where the celiac trunk would typically originate and demonstrates a different branching pattern. *Brachiocephalic trunk* - The **brachiocephalic trunk** (also known as the innominate artery) is a major artery in the upper chest, typically the first branch off the aortic arch. - It supplies blood to the right arm and head, not abdominal organs, making it anatomically incorrect for the artery labeled 'X'.
Question 9: Ligation of the common hepatic artery will compromise blood flow in
- A. Right gastric artery and short gastric arteries
- B. Right gastric artery and right gastroepiploic artery (Correct Answer)
- C. Right gastric artery and left gastric artery
- D. Right gastroepiploic artery and short gastric arteries
Explanation: ***Right gastric artery and right gastroepiploic artery*** - The **common hepatic artery** gives rise to the **gastroduodenal artery**, which then branches into the **right gastroepiploic artery** and the **superior pancreaticoduodenal artery**. - The **right gastric artery** typically arises from the **proper hepatic artery** (the continuation of the common hepatic artery after the gastroduodenal branches off), though it may occasionally arise directly from the common hepatic artery. - Therefore, ligation of the **common hepatic artery** would compromise blood flow to both these vessels. *Right gastric artery and short gastric arteries* - While the **right gastric artery** would be affected by common hepatic artery ligation, the **short gastric arteries** arise from the **splenic artery**. - Therefore, ligating the common hepatic artery would not compromise blood flow to the short gastric arteries. *Right gastric artery and left gastric artery* - The **right gastric artery** would be compromised by common hepatic artery ligation. - However, the **left gastric artery** is a direct branch of the **celiac trunk**, not the common hepatic artery, so its blood flow would remain unaffected. *Right gastroepiploic artery and short gastric arteries* - The **right gastroepiploic artery** is indeed a branch of the **gastroduodenal artery**, which comes from the **common hepatic artery**, so it would be compromised. - However, the **short gastric arteries** arise from the **splenic artery**, meaning their blood supply would not be affected by common hepatic artery ligation.
Question 10: Gastrosplenic ligament contains ?
- A. Splenic vessels
- B. Tail of pancreas
- C. Short gastric artery (Correct Answer)
- D. Portal vein
Explanation: ***Short gastric artery*** - The **short gastric arteries** are branches of the **splenic artery** and supply the **fundus** and upper part of the **greater curvature** of the stomach. - These vessels travel within the **gastrosplenic ligament** (or gastrosplenic omentum), connecting the greater curvature of the stomach to the hilum of the spleen [1]. *Splenic vessels* - The **splenic artery** and **vein** primarily travel within the **splenorenal ligament** (or lienorenal ligament), connecting the spleen to the posterior abdominal wall. - These major vessels supply and drain the spleen itself, not typically running within the gastrosplenic ligament [1]. *Tail of pancreas* - The **tail of the pancreas** is typically located within the **splenorenal ligament**, closely associated with the **hilum of the spleen** [1]. - It does not extend into the gastrosplenic ligament, which connects the stomach to the spleen. *Portal vein* - The **portal vein** is a major vessel formed by the confluence of the **splenic vein** and **superior mesenteric vein**, and it is located in the **hepatoduodenal ligament** (part of the lesser omentum) along with the hepatic artery and common bile duct. - This vessel is far removed from the gastrosplenic ligament, which is situated between the stomach and spleen.
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